proteus仿真DAC0832数模转换示波器显示波形 -

#include <reg52.h>
sbit key1=P1^0; //定义方波发生按钮
sbit key2=P1^1; //定义三角波发生按钮
sbit key3=P1^2; //定义正弦波发生按钮
unsigned char code S[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5
,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5
,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd
,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda
,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99
,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51
,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16
,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02 ,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15
,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e
,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80 }; //正弦波编码
void main()
{
int t=0;
void Delay(int i);
void Fangbo(void);
void Sanjiaobo(void);
void Zhengxianbo(void);
while(1)
{
if(key1==0) //按键扫描
{
Delay(1);
if(key1==0)
{
while(!key1)
{;}
}
t=0;
}
if(key2==0)
{
Delay(1);
if(key2==0)
{
while(!key2)
{;}
}
t=1;
}
if(key3==0)
{
Delay(1);
if(key3==0)
{
while(!key3)
{;}
}
t=2;
}
switch(t)
{
case 0:
{
Fangbo();
break;
}
case 1:
{
Sanjiaobo();
break;
}
case 2:
{
Zhengxianbo();
break;
}
}
}
}
void Delay(int i) //延时函数
{
int j=255;
for(i;i>=0;i--)
{
for(j;j>=0;j--)
{;}
}
}
void Fangbo(void) //方波发生函数
{
P2=0;
Delay(1);
P2=255;
Delay(1);
}
void Sanjiaobo(void) //三角波发生函数
{
int i=0;
for(i;i<255;i++)
{
P2=i;
}
for(i;i>0;i--)
{
P2=i;
}
}
void Zhengxianbo(void) //正弦波发生函数
{
int i=0;
for(i;i<=255;i++)
{
P2=S[i];
}
}

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